/** Drain live editors, then enter presentation. No fullscreen — embed/agentic. */
export declare function beginScreening(options?: {
    fromStart?: boolean;
}): void;
/** Editor Present / F5: drain, screen, then request fullscreen. */
export declare function enterScreening(options?: {
    fromStart?: boolean;
}): void;
export declare function enterScreeningFromStart(): void;
export declare function exitScreening(): void;